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We study mapping class group orbits of homotopy and isotopy classes of curves with self-intersections. We exhibit the asymptotics of the number of such orbits of curves with a bounded number of self-intersections, as the complexity of the…

Geometric Topology · Mathematics 2016-05-24 Patricia Cahn , Federica Fanoni , Bram Petri

For a complete, finite volume real hyperbolic n-manifold M, we investigate the map between homology of the cusps of M and the homology of $M$. Our main result provides a proof of a result required in a recent paper of Frigerio, Lafont, and…

Geometric Topology · Mathematics 2015-06-04 D. B. McReynolds , Alan W. Reid , Matthew Stover

Let $S$ be a complete flat surface, such as the Euclidean plane. We determine the homeomorphism class of the space of all curves on $S$ which start and end at given points in given directions and whose curvatures are constrained to lie in a…

Geometric Topology · Mathematics 2025-10-28 Nicolau C. Saldanha , Pedro Zühlke

We consider complex Henon maps which are quasi-hyperbolic. We show that a quasi-hyperbolic map is uniformly hyperbolic if and only if there are no tangencies between stable and unstable manifolds.

Dynamical Systems · Mathematics 2020-06-02 Eric Bedford , Lorenzo Guerini , John Smillie

The comparison map from bounded cohomology to singular cohomology plays an important role in the study of bounded cohomology theory and its applications. The vanishing and covering theorems of Gromov and Ivanov show interesting and useful…

Algebraic Topology · Mathematics 2022-10-25 George Raptis

The purpose of this paper is to study the harmonicity of maps to or from para-Sasakian manifolds. We derive the condition for the tension field of paraholomorphic map between almost para-Hermitian manifold and para-Sasakian manifold. The…

Differential Geometry · Mathematics 2016-03-16 S. K. Srivastava , K. Srivastava

We consider the homotopy type of maps between symplectic surface whose graphs form symplectic submanifolds of the product. We give a purely topological model for this space in terms of maps with constrained numbers of pre-images. We use…

Symplectic Geometry · Mathematics 2007-05-23 Joseph Coffey

We study the space of pseudo-holomorphic spheres in compact symplectic manifolds with convex boundary. We show that the theory of Gromov-Witten invariants can be extended to the class of semi-positive manifolds with convex boundary. This…

Symplectic Geometry · Mathematics 2013-02-06 Sergei Lanzat

In this paper we study the set of projective maps between compact proper convex real projective manifolds. We show that this set contains only finitely many distinct homotopy classes and each homotopy class has the structure of a real…

Differential Geometry · Mathematics 2015-07-01 Andrew Zimmer

We characterize maps between $n$-dimensional N\"obeling manifolds that can be approximated by homeomorphisms.

Geometric Topology · Mathematics 2007-06-20 A. Chigogidze , A. Nagorko

Second order Sobolev metrics are a useful tool in the shape analysis of curves. In this paper we combine these metrics with varifold-based inexact matching to explore a new strategy of computing geodesics between unparametrized curves. We…

Differential Geometry · Mathematics 2017-06-07 Martins Bauer , Martins Bruveris , Nicolas Charon , Jakob Møller-Andersen

Given a flat metric one may generate a local Hamiltonian structure via the fundamental result of Dubrovin and Novikov. More generally, a flat pencil of metrics will generate a local bi-Hamiltonian structure, and with additional…

Differential Geometry · Mathematics 2020-12-16 Liana David , Ian A. B. Strachan

A quasi-schemoid is a small category with a particular partition of the set of morphisms. We define a homotopy relation on the category of quasi-schemoids and study its fundamental properties. As a homotopy invariant, the homotopy set of…

Category Theory · Mathematics 2014-10-27 Katsuhiko Kuribayashi

We prove that the recently shown cohomological obstruction for quasiregular ellipticity has a generalization in the theory of quasiregular values. More specifically, if $M$ is a closed, connected, and oriented Riemannian $n$-manifold, and…

Differential Geometry · Mathematics 2025-11-06 Susanna Heikkilä , Ilmari Kangasniemi

Sobolev spaces are a natural framework for the analysis of problems in partial differential equations and calculus of variations. Some physical and geometric contexts, such as liquid crystals models and harmonic maps, lead to consider…

Analysis of PDEs · Mathematics 2017-02-06 Jean Van Schaftingen

Gromov has shown how to construct holomorphic maps of the plane to a complex manifold with prescribed values on a lattice. In the present paper, a similar interpolation theorem for pseudo-holomorphic maps from the cylinder S to an…

Differential Geometry · Mathematics 2010-06-10 Antoine Gournay

An approximation theorem of Youngs (1948) asserts that a continuous map between compact oriented topological 2-manifolds (surfaces) is monotone if and only if it is a uniform limit of homeomorphisms. Analogous approximation of Sobolev…

Complex Variables · Mathematics 2016-01-27 Tadeusz Iwaniec , Jani Onninen

It is shown that the middle quasi-homomorphisms of Fujiwara and Kapovich are precisely constant perturbations of quasi-homomorphisms. Quasi-polynomial maps are defined and their constructibility is explored. In particular, it is shown that…

Group Theory · Mathematics 2025-06-03 Primoz Moravec

In this paper we give various characterizations of quasiopen sets and quasicontinuous functions on metric spaces. For complete metric spaces equipped with a doubling measure supporting a p-Poincar\'e inequality we show that quasiopen and…

Functional Analysis · Mathematics 2017-02-13 Anders Björn , Jana Björn , Jan Malý

Following the work of Rosendal and Mann and Rafi, we try to answer the following question: when is the mapping class group of an infinite-type surface quasi-isometric to a graph whose vertices are curves on that surface? With the assumption…

Geometric Topology · Mathematics 2022-08-08 Anschel Schaffer-Cohen